"An adventurer investigates the theft of a formula for hardened steel, assisted by his girlfriend."
Terence Morgan
as Johnny O'Flynn
Joan Rice
as Doreen Wilson
Raymond Lovell
as Inspector Forsythe
Dianne Foster
as Sylvia Newman
Colin Tapley
as Dr. Crabtree
Esmond Knight
as Prof. Newman
Mark Baker
as Dr. Metcalfe
Cyril Conway
as Sgt. Cove
Hector Ross
as Beroni
Arthur Lovegrove
as Gilchrist
Esma Cannon
as Patient in Doctor's Waiting Room
Sam Kydd
as Chauffeur
Michael Balfour
as 'The Mae McCleod' Captain
Tom Gill
as Hotel Receptionist
Hal Osmond
as Taxi Driver
Robert S. Baker
Director
Roy Chanslor
Story
Desmond Davis
Focus Puller
John Gilling
Screenplay
Producer
Monty Berman
Frank Cordell
Original Music Composer
Gerald Gibbs
Director of Photography
Peter Taylor
Editor
Gerry Fairbank
Makeup Artist
Adrian D. Worker
Production Manager
George Fowler
Assistant Director
Leonard Bulkley
Sound Recordist
George Burgess
Sound Supervisor
Dudley Lovell
Camera Operator
Pamela Carlton
Continuity
